Oil burner feed mechanism



July 12, 1932. c. L. RAYFIELD OIL BURNER FEED MECHANIS"! 2 Sheets- -Sheet 1 Filed Dec. 26, 1929 Patented July 12, 1932 UNITED STATE'SPATENT OFFICE cnannns L. aarrmnn, or cmcaeo, rumors, AssIeNoa 'ro BAYFIELID MFG. co., or

crncaeo, rumors, A oonroaarron or rumors on; BURNER rnnn mncmmsu Application filed December 26, 1929. Serial No. 416,892.

7 My invention relates to a methodof and apparatus for pumping fluid such as fuel to oil burner nozzles and the like.

One of the important objects of the invention is to uti ize a pump structure of the angular rotary type in which sets of interconnected plungers disposed at right angles to each other to operate consecutively to propel fluid in a constant regular stream without any check or momentary interruption to the flow for use in pumping a multifluid stream such as atomized fuel used in an oil burner.

Another important object of the invention is to utilize one of the pump sections of the pump structure for pumping fluid into a supply'source and the other pump section for pumping the fluid from the supply source and delivering it to the place of consumption.

A further important object of this invention is to utilize one of the pump sections of the type of pump structure referred to for circulating combustion fluid to and from a supply source, and utilizing the other pump sect10n for receiving a part of this circulat-' ing combustion fluid and mixing air under pressure therewith to cause atomization of the fluid and to form a good combustion mixture to be delivered to a source of consumption such as an oil burner nozzle.

Another object of my invention is to provide a fuel pumping system in which oil discharged from a pump is utilized for lubri-.

eating and sealing purposes in connection with both the pump and a compressor prior to the combination of the oil with compressed air for atomizing the oil.

A further object is to utilize one of the pump sections of the pump structure for pumping combustible oil and adapting the other pump section of the structure for receiving the pumped'oil and for causing atomization thereof by mixing compressed air therewith in order to form a combustion mixture to be delivered by this construction to a source of supply suh as a burner nozzle in an oil burner system;

A still further object is to utilize the pump structure as a two step compressor, one pump compression and section subjecting a fluid to a preliminary.

the other pump section receiving and subjecting. the fluid to afinal compression before delivery thereof from the pump structure.

Another important object of the invention isto utilize one of the pump sections of the pump structure for forcing the oil under pressure through the pump structure housing in order to seal and lubricate the plungers and the rotary cylinders, and to hold to 1 is a side elevational view of the rotary angular pump structure.

Figure 2 is a sectional view on plane IIII,-Figurc 1. t

Figure 3 is a side elevational view with the rotary cylinder and enclosing housing in vertical diametrical section.

Figure 4 is a section on line IVIV of Figure 3.

Figure 5 is a view on 1 and 3, and

Figure 6 is a diagrammatic view showing plane V-V, Figures 1 the connection of the pump structure in service for supplying combustion fuel for a combustion device such as an oil burner.

The pump structure comprises the cylindrical housing 10 and 11 detachably secured together at their inner ends along a plane of 45 by means of their flanges 12 and 13 and screws 14, the housing being thus at a right angle with each other. A head 15 is applied to the outer end of the housing 10 and is detachably secured thereto by means of screws 16 passing through the head flange 17 and the flange 18 on the housing. A head 19 is applied to the outer end of the housing 11 and is detachably secured thereto by screws 20 passing through the flange 21 on the head and engaging in the flange 22 of the housing.

At the juncture of the housings 10 and 11 is the chamber 23 and between this chamber and the head 15 is the rotary cylinder 24- -their seats the rotary cylinders which con.

which is confined axially between the top surface of the head and the bevelled annular flange or shoulder 25. The cylinder has a plurality of cylindrical bores 26 extending longitudinally therethrough. Four such bores are shown regularly spaced about the cylinder axis, and reciprocable in each bore is a plunger 27. The lower end of the cylinder is closed by a wall 28 having ports 29, one for each bore. Extending axiall from the wall 28jis a cylindrical stub 30 which en ages in the upper end of the bore 30' of the ead 15. The c linder 24 the wall 28 and the stub 30 may e part of an integral casting, or as shown the stub may be integral with the wall 28 and the wall secured'to the cylinder as by means of the threaded stud 31. Within the housing 11 is the rotary cylinder 32 which seats at its outer end against the head 19 and engages at its upper end against the bevelled annular shoulder 33. Like the cylinder 24, this cylinder 32 has four longitudinal bores 34 in each of which engages a plunger 35. The cylinder has the outer wall 36 which may be integral therewith or secured thereto as by means of a threaded stud 37, and extending axiall from the wall is a shaft 38 which journals 1n.the head 19 and projects therefrom for the attachment thereto ofa suitable driving motor (not shown). The wall 36 has the ports 39, one for each of the bores .34.

The plungers in the corresponding bores of the two cylinders are rigidl connected together at their outer ends as by means of an angular web 40 so that when the shaft 38 and the cylinder 32 connected therewith are rotated, the angular plunger structures will reciprocate in the bores of the two cylinders and will also partake of bodily movement and will transmit the rotation of the cylinder 32 to the cylinder 24, all'in a manner well understood in the art. 1

The head 15 has at one side a radially extending inlet passageway 41 adapted to be connected by suitable pi ing 42 with an oil supply reservoir (not s own). From this inlet passageway a port passageway 43 extends through the head and terminates at the upper face thereof in an arcuate channel 44 concentric with the axis of cylinder 24 and in the path of the ports 29 in such cylinder. At is opposite side the head has the outlet passage 45 from which extendsa port passageway 46 to the upper face of the head and there terminates in the arcuate channel 47 which is also-in the path of the cylinder ports 29. These channels 44 and 47 are not quite semi-circular but their ends are separated by spaces 48 and 49 whose width is equal to or. slightly greater than the diameter of the cylinder orts 29. During each rotation of the cylin er- 24' each of its plungers will make a complete back and forth stroke in the respective bore and during theinward stroke of each plunger the associated port 29 will be in register with the inlet channel 44, and during the outward stroke of such plunger the port will be in communication with the outlet channel 47. At the end of each stroke of the plungerits associated port will-be closed by either of the spaces 48 and 49 between the, ends OfthBFhfiIlIlGlS. The plungers operate consecutivel and during the inward strokes fluid will e drawn into the respective bores through the inlet channel 44, and during the outward strokes such drawn in fluid will be expelled through the outlet channel 47 and to the head outlet as sage 45 from where it may be conducted by suitable piping 50..

In the head 19 the arrangement is similar to that in the head 15. The inlet passage 51 has a port passage 52 extending therefrom and terminating in the face of the head 19 in the arcuate channel 53' disposed in the path of the ports 39 of cylinder 32. The outlet passage 54 is connected by port passageway 55 with the arcuate channel 56 in the face of the head 19, this channel being also in the path of the ports 39 and the channels being separated by the spaces. 57 on the head face. The plungers in cylinder 32 operate consecutively and in unison with those of cylinder 24 and during the in stroke of aplunger its associated port will be in communication with the inlet channel 53 and during the out stroke the port will be in communication with the outlet channel 56. The fluid is thus drawn into the cylinder bores from the inlet 51 and discharged therefrom into the outlet 54.

The housin 10 has a longitudinal boss 58 one one side t rough which extends the passageway 59 which is connected at its lower end with the outlet passageway 45 by way I of the port passage 60 through the head 15. At its upper end this passage 59 communicates with the chamber 23 at the junction of the housings 10 and 11.

The housin 11 has a longitudinal boss 61 through whic extends a assageway 62 which communicates at its ower end with the inlet passageway 51 by way of the port passage 63 in the head 19. The passageway 62 communicates at its upper end with a lateral inlet passage 64 which may be connected directly by piping 65 with the chamber 23 in the pump structure housing. Designating the two pump sections of the pump structure as P and P, it will be noted that the pump section P, when pumping oil, will deliver it by way of the chamber 23 to the inlet of the pump section P, the oil flowing from the outlet 45 of the pump section P through passageway 59, chamber 23, pipe 65, and passages 64, 62 and 63 to the inlet end 51 of the pump section P. When the oil is under pressure it.

will fill the chamber'23 and will form a seal for the plungers, and the pressure against the cylinders will hold them against their seats 7 mg system and in that case provision would on the heads 15 and 19 respectively so as to prevent leakage. The oil will also lubricate theplungers and the cylinders and will reduce friction to a minimum. s

When the pump section P is directly connected with the ump section P, the fluid will first be put un er pressure in the pump section P, and the fluid will then be delivered through suitable piping 66 to the source of consumption. Such consumption source might be the burner or nozzle of an oil burnpreferably be made to supply air to the pump structure P to be compressed therein and thoroughly mingled with the fluid under compression so that the fluid, in this case oil,

would be thoroughly atomized and aerated before delivery to the burner. In Figure 4 I have shown an air intake 67 through which air may be drawn into the pump section. inlet passage 51 to mingle with the oil flowin into said inlet from the passageway 62. l rovi sion may be made to adjust for the pressure of the fluid delivered by the pump section P to the pump section P and in Figure 2, I have shown the outlet piping50 of the pump section P to include an automaticall controlled check valve 68 by-passed back to the fluid supply reservoir when the pressure of the pumped fluid tends torise above a certain predetermined amount. Under such arrangement the pressure of the fluid delivered by the pump section P to the pump section P will be kept constant.

Instead of having the pump section P deliver directly to the pump section P it could be connected to deliver first to an auxiliary tank 69 as shown in Figure 6 and'this tank may be of the type disclosed in copending I have shown the pipe connected from chamber 23 with the'inlet of the auxiliary tank instead of directly with the pump section P, and the tank outlet is connected by pipe 70 with the inlet 64 of the pump section so that the fluid will be delivered first to the auxiliary tank and then drawn therefrom by the pump section P to be mixed with air entering the air intake 67, the air being then compressed and the fluid, in this case oil, being thoroughlyatomized and aerated under pressure before delivery to the burner. I have shown supporting structure 71 for the auxiliary tank, and the pump structure can also be mounted on said support as by means of a stud 72 threaded intothe outer end of the bore 30 in thehead 15.

In the rotary angular pump structure utili-zed, the plungers reciprocate successively rapidly and with perfect regularity so that the fluid or mixture delivered is in a constant regular stream without any check ormomenbe uniform and constant.

netically or trolled to shut off part1 through which uid will be tary interruption to the flow, and as the section P draws from a constant head auxiliary Pp m the tank 69, the delivery pressure will i The pump structure also lubricates itself under pressure and keeps itself sealed against leakage.

In Figure 6, I have shown a valve 73 included in the intake pipe 70. for'the pump structural This valve may be electromagotherwise automatically conor wholly the fluid intake by pump P. of the valve 73, the tank '69, as soon as it is filled to normal level, will be closed .by its float controlled valve to further inflow from the pump section P and the delivery fromsaid pump SGCtlOIlWlll then be diverted back to the maln reservoir through the check valve 68 which may be spring controlled.

It is evident structure maybe 7 step compressor for compressible fluids such as air, the fluid being su jected to initial compression in one of the pump sections and then-to increased or final compression in the other pump section. Incompressible fluids such as liquids would be given an initial pressure head in one ofthe pump sections and an increased or final ressure head in the other pump section. ne way of using my pump as a two stage compressor would be to use larger bores 1n the first pump section than in the second section andanother way that my improved pump 'w0uld beto use less cylinder bores in the -the volume of the compressed air leaving the first pump section.

- The pump structure, on account of its simplicity of construction and operation and the elimination of all valves or other delicate parts, is particularly adaptable for use in oil burner systems.

While I have shown and described'my invention in a preferred form, changes and modification in structure and arrangement may be made withoutdeparting from the spirit and scope of. the invention and I therefore, do not limit my invention except as specified in the appended claims.

I claim as follows:

In a pump structure of the class described, the combination of a housing comprising two cylindrical sections secured together at an angle with each other, a cylinder in each section rotatable therein, driving means connected with one of said cylindersj said cylinders having corresponding longi tudinal cylindrical'bores, pairs of plungers joined at their outer endsand reciprocable in corresponding .bores of said cylinders for translating the rotary movement of the driven cylinder into corresponding rotary movement of the other cylinder, a head for each section closing the end thereof and 0 course, upon closure used to advantage as a twoforming a seat for the respective cylinder,

is consecutively drawn from the head inlet' into the bores by the plungers and expelled therefrom through the head outlet, and a fluid connection between the outlet of one head and the inlet of the other, the interior of said housing being included in said connection.

2. In a pump structure of the class described, the combination of a housing comprising two cylindrical sections disposed at an angle with each other, a cylinder rotatable in each section and one of said 0 linders being adapted to be connected with riving means, said cylinders having corresponding cylindrical longitudinal bores, pairs of plungers joined at their outer ends and reciprocable in corresponding bores of said cylinders for translatin the rotary movement of the driven cy inder into corres onding rotary movement of the other cylin er, a fluid inlet passageway and a fluid outlet passageway at the end of each section terminating in inlet and outlet channels adjacent to the outer ends ofthe bores of the respective cylinders, the

bores of each cylinder consecutively com municating alternately with said in and outlet channels as the cylinder rotates whereby fluid is pumped from the inlet passageway into the outlet passageway of each sec tion, a chamber in said housing adjacent to the inner ends of said cylinders, and a fluid connection between the outlet passage of one of said sections and said chamber.

3. A fluid pump structure comprisingtwo rotary pump sectlonshaving their axes at anangle with each other, each section comprising a stationary cylindrical housing, a cylm er rotatable 1n each housin and having a plurality of longitudinal ,cyfindrical bores therein regularly spaced around the cylinder axis, one of said cylinders being adapted to be driven, pairs of plungers joined at their inner ends and engaging in corresponding bores of said cylinders for transmitting the rotation of the driven cylinder to the other cylinder, a head for each pump section forming a seat for the cylinder therein, a fluid inlet passage and a fluid outlet passage in each head, said passages terminating in intake and outlet ports respectively for alternate communication with the successive bores of the associated cylinder as the cylinder is rotated, each bore communicating during the in stroke of its plunger with the inlet port and with the outlet port durin the out stroke of its plung er whereby the p ung'ers of each pump structure will successively induct fluid from the vsections to sai correspondin head inlet passa e and discharge the fluid through the hea outlet assage, a chamber connecting theinner en s of said housings for holding fluid under ressure a connection for the flow of, fluid cm the discharge assage of one of said pump d chamber, said chamber having an outlet, and a connection for conducting fluid from said outlet to the inlet of the other pump section.

4. Apump structure for pumping combus-' tible 0 com rising two rotary pump sections having t eir axes at an angle with each other, each section comprising a stationary cylindrical housing, a cylinder rotatable in each housing and having a plurality of longitudinal cyl ndrical bores therein regularly spaced around the cylinder axis, one of said cylinders being adapted to be driven, pairs of plungers joined at their inner ends and engaging in corresponding bores of said cylin ers for transmitting the rotation of the driven cylinder to the other cylinder, a head for each pump section forming a seat for the cylinder therein, an inlet passage and an outlet passage in each head, said passages terminating in intake and outlet ports respectively for alternate communication with the successive bores of the associated cylinder as the cylinder is rotated, each bore communicating during the instroke of its lunger with the inlet port and with the out et port during the out stroke of its plunger whereby the plungers of each pump structure will successively induct oil from the corresponding head inlet passage, and discharge the oil through the head outlet passage, a chamber connecting the inner ends of said housings, a connection for the flow of oil from the discharge passage of one of said pump sections to said chamber, said chamber having an outlet, and a connection to: conducting oil from said outlet to the inlet of the other pump section, said otherpump section having an air inlet for the intake of air together with the oil to be compressed in said pump section and to mix with and atomize t e oil before delivery of the oil from said pump section outlet.

5. In a fluid pumping device an angular pump construction comprising sets of connected pistons, the pistons of each set being disposed at an angle to each other, housing means including angular legs to define cylinders for said pistons, and a chamber at the junction of said legs, and means for conveying the fluid discharge from one leg through said chamber to enable said fluid to act as a sealing medium for said sets of pistons.

6. In a.fluid pumping device an angular pump construction comprising sets of connected pistons, the pistons, of each set being disposed at an angle to each other, housing means including angular legs to define cylinders for said pistons, and a chamber at the junction of said legs, means for conveying the fluid discharge from one leg through said chamber to enable said fluid to act as a sealing medium for said sets of pistons, and means for thereafter combining said fluid with the the pistons in the other ti'on moving into said chamber, means for de-' livering fluid to one leg of said housin and means for conveying the fluid from said leg to the other leg of said housing, the path of said fluid being through said chamber wherein said fluid serves'to lubricate and seal said cylinders and pistons.

8. In a fluid pumping device, anangular pump construction comprising sets of integral pistons disposed at an angle to each other, housing means including angular legs to define cylinders for said pistons and a closed chamber communicating with the inner ends of said cylinders, seats associated with the outer ends of said cylinders, means for delivering fluid to one leg of said housing, and means for conveying said fluid" after compression in said leg to the other leg of said housing, the path of said fluid being through said chamber wherein said fluid acts upon the inner ends of the cylinders in such a manner as to force the cylinders outwardly against their seats.

- testimony whereof I have hereunto subscribed my name at. Chicago, Cook County,

Illinois.

CHARLES L.

device, an angular 

